package com.jk.tweetsnear.gps;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;

import com.jk.tweetsnear.utils.Utils;

public class GPSTracker extends Service implements LocationListener
{

	private final Activity act;

	// flag for GPS status
	boolean isGPSEnabled = false;

	// flag for network status
	boolean isNetworkEnabled = false;

	// flag for GPS status
	boolean canGetLocation = false;

	Location location; // location
	double latitude; // latitude
	double longitude; // longitude

	// The minimum distance to change Updates in meters
	private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters

	// The minimum time between updates in milliseconds
	private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute

	// Declaring a Location Manager
	protected LocationManager locationManager;

	public GPSTracker(Activity act)
	{
		this.act = act;
		getLocation();
	}

	public Location getLocation()
	{
		try
		{
			locationManager = (LocationManager) act.getSystemService(LOCATION_SERVICE);

			// getting GPS status
			isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

			// getting network status
			isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

			if (!isGPSEnabled && !isNetworkEnabled)
			{
				// no network provider is enabled
			} else
			{
				this.canGetLocation = true;
				if (isNetworkEnabled)
				{
					locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
					Log.d("Network", "Network");
					if (locationManager != null)
					{
						location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
						if (location != null)
						{
							latitude = location.getLatitude();
							longitude = location.getLongitude();
						}
					}
				}
				// if GPS Enabled get lat/long using GPS Services
				if (isGPSEnabled)
				{
					if (location == null)
					{
						locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
						Log.d("GPS Enabled", "GPS Enabled");
						if (locationManager != null)
						{
							location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
							if (location != null)
							{
								latitude = location.getLatitude();
								longitude = location.getLongitude();
							}
						}
					}
				}
			}

		} catch (Exception e)
		{
			e.printStackTrace();
		}

		return location;
	}

	/**
	 * Stop using GPS listener Calling this function will stop using GPS in your
	 * app
	 * */
	public void stopUsingGPS()
	{
		if (locationManager != null)
		{
			locationManager.removeUpdates(GPSTracker.this);
		}
	}

	/**
	 * Function to get latitude
	 * */
	public double getLatitude()
	{
		if (location != null)
		{
			latitude = location.getLatitude();
		}

		// return latitude
		return latitude;
	}

	/**
	 * Function to get longitude
	 * */
	public double getLongitude()
	{
		if (location != null)
		{
			longitude = location.getLongitude();
		}

		// return longitude
		return longitude;
	}

	/**
	 * Function to check GPS/wifi enabled
	 * 
	 * @return boolean
	 * */
	public boolean canGetLocation()
	{
		return this.canGetLocation;
	}

	/**
	 * Function to show settings alert dialog On pressing Settings button will
	 * lauch Settings Options
	 * */
	public void showSettingsAlert(final Activity act)
	{
		AlertDialog.Builder alertDialog = new AlertDialog.Builder(act);

		alertDialog.setCancelable(false);
		alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu? \n\n Please check all the menus.");
		alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener()
		{
			public void onClick(DialogInterface dialog, int which)
			{
				Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
				act.startActivity(intent);
			}
		});

		alertDialog.setNegativeButton("App exit", new DialogInterface.OnClickListener()
		{
			public void onClick(DialogInterface dialog, int which)
			{
				//dialog.cancel();
				Utils.setExit(act);
			}
		});

		alertDialog.show();
	}

	@Override
	public void onLocationChanged(Location location)
	{
	}

	@Override
	public void onProviderDisabled(String provider)
	{
	}

	@Override
	public void onProviderEnabled(String provider)
	{
	}

	@Override
	public void onStatusChanged(String provider, int status, Bundle extras)
	{
	}

	@Override
	public IBinder onBind(Intent arg0)
	{
		return null;
	}

}
